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Products

PISTON VALVES

SEAT LESS & GLANDLESS PISTON VALVE

We are manufacturing seat less and gland less Piston valves with range of NPS ½“ (DN15) to NPS 12” (DN300) ASME class rating 150#, 300# and 800#. Piston valves are available with different Materials of construction with Flange, Screwed, Socket and Butt Weld End Connections.


DESIGN VARIANTS
Design Piston Valves
Construction Single Piece
End Connection Flanged Butt Weld Socket Weld
Threaded (NPT, BSPT, BSPP)
Pressure Rating Class 150# - Class 300#, Class 800#

Materials of Construction
No. Part Cast Steel - 150# & 300# Forged Steel - 800#
1 Body A216 Gr. WCB A105
2 Bonnet A216 Gr. WCB A105
3 Spindle AISI 410
4 Piston AISI 304
5 Split-Nut Brass
6 Lantern Bush AISI 304 / A743 CA15
7 Lower Valve Ring Grafoil with SS Reinforcement
8 Upper Valve Ring Grafoil with SS Reinforcement
9 Stud A193 Gr. B7
10 Nut A194 Gr. 2H
11 Belleville Washers 50 Cr V4
12 Hand Wheel Cast Iron
GENERAL SPECIFICATIONS
Model DV-PFE1, DV-PSW2, DV-PBW3
Sizes NPS ½” (DN 15) – NPS 12” (DN 300)
– Flange End and Butt Weld
NPS ½” (DN 15) – NPS 2” (DN 50)
– Socket Weld and Screwed End Forged
Type Seat less and Gland less
Pressure Class Class 150#, Class 300#, Class 800#
End Connection Flanged RF,Screwed End, Socket End, Butt Weld
Valve Design Standard ASME B16.34, EN 12516-2
Flange Dimensions ASME B16.5
Face to Face ASME B16.10, ASME B16.11
Pressure Testing API 598
Material of Construction Wide range and most suitable material selection available for any kind of application.
 Valve operation All our Piston valves on above ranges are manual operated with Handle/Lever/ Gearboxes and Actuators are available upon request.

Applications::

  • Steam Header
  • Steam Manifolds
  • Condensate Manifolds
  • Thermic Fluid Lines
  • Pressure Reducing Stations
  • De Super Heating Stations
  • Steam Trap Isolation Valves
  • Process Steam & Utilities
  • Chemicals
  • Fatty Acids

Advantages of our Piston Valves

  • Exceptional leak tightness across the ports and to atmosphere.
  • Environmentally safe and energy efficient.
  • Long-time maintenance free, no wear on sealing surfaces.
  • Insensitive to impurities due to maintenance free sealing system.
  • Lower cost of ownership.
  • Valve rings are replaceable in the line.
  • Excellent control statistics.